How do you use area models to divide #210 div 10#?
Well, I can't draw, so I'll explain. You draw a 10x21 Grid, and then divide each 10. Write 1, 2, 3, 4, ... until 21 under each section of the grid.
Well, we know
So, we will draw a 10x21 grid.
Divide the grid horizontally so that there are 21 equal pieces.
Label each piece like 1, 2, 3, 4, 5, ... and so on.
When you get to 21, circle your answer.